中国物理B ›› 2015, Vol. 24 ›› Issue (9): 97401-097401.doi: 10.1088/1674-1056/24/9/097401

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Strongly enhanced flux pinning in the YBa2Cu3O7-X films with the co-doping of BaTiO3 nanorod and Y2O3 nanoparticles at 65 K

王洪艳a b, 丁发柱a, 古宏伟a, 张腾a   

  1. a Key Laboratory of Applied Superconductivity, Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China;
    b University of Chinese Academy of Sciences, Beijing 100049, China
  • 收稿日期:2014-12-10 修回日期:2015-03-30 出版日期:2015-09-05 发布日期:2015-09-05
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 51272250), the National Basic Research Program of China (Grant No. 2011CBA00105), the National High Technology Research and Development Program of China (Grant No. 2014AA032702), and the Natural Science Foundation of Beijing, China (Grant No. 2152035).

Strongly enhanced flux pinning in the YBa2Cu3O7-X films with the co-doping of BaTiO3 nanorod and Y2O3 nanoparticles at 65 K

Wang Hong-Yan (王洪艳)a b, Ding Fa-Zhu (丁发柱)a, Gu Hong-Wei (古宏伟)a, Zhang Teng (张腾)a   

  1. a Key Laboratory of Applied Superconductivity, Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China;
    b University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2014-12-10 Revised:2015-03-30 Online:2015-09-05 Published:2015-09-05
  • Contact: Ding Fa-Zhu, Gu Hong-Wei E-mail:dingfazhu@mail.iee.ac.cn;guhw@mail.iee.ac.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 51272250), the National Basic Research Program of China (Grant No. 2011CBA00105), the National High Technology Research and Development Program of China (Grant No. 2014AA032702), and the Natural Science Foundation of Beijing, China (Grant No. 2152035).

摘要: YBa2Cu3O7-x (YBCO) films with co-doping BaTiO3 (BTO) and Y2O3 nanostructures were prepared by metal organic deposition using trifluoroacetates (TFA-MOD). The properties of the BTO/Y2O3 co-doped YBCO films with different excess yttrium have been systematically studied by x-ray diffraction (XRD), Raman spectra, and scanning electron microscope (SEM). The optimized content of yttrium excess in the BTO/Y2O3 co-doped YBCO films is 10 mol.%, and the critical current density is as high as ~ 17 mA/cm2 (self-field, 65 K) by the magnetic signal. In addition, the Y2Cu2O5 was formed when the content of yttrium excess increases to 24 mol.%, which may result in the deterioration of the superconducting properties and the microstructure. The unique combination of the different types of nanostructures of BTO and Y2O3 in the doped YBCO films, compared with the pure YBCO films and BTO doped YBCO films, enhances the critical current density (JC) not only at the self-magnetic field, but also in the applied magnetic field.

关键词: YBa2Cu3O7-x (YBCO) film, flux pinning, BaTiO3 (BTO) and Y2O3 nanostructures, metal organic deposition using trifluoroacetates (TFA-MOD)

Abstract: YBa2Cu3O7-x (YBCO) films with co-doping BaTiO3 (BTO) and Y2O3 nanostructures were prepared by metal organic deposition using trifluoroacetates (TFA-MOD). The properties of the BTO/Y2O3 co-doped YBCO films with different excess yttrium have been systematically studied by x-ray diffraction (XRD), Raman spectra, and scanning electron microscope (SEM). The optimized content of yttrium excess in the BTO/Y2O3 co-doped YBCO films is 10 mol.%, and the critical current density is as high as ~ 17 mA/cm2 (self-field, 65 K) by the magnetic signal. In addition, the Y2Cu2O5 was formed when the content of yttrium excess increases to 24 mol.%, which may result in the deterioration of the superconducting properties and the microstructure. The unique combination of the different types of nanostructures of BTO and Y2O3 in the doped YBCO films, compared with the pure YBCO films and BTO doped YBCO films, enhances the critical current density (JC) not only at the self-magnetic field, but also in the applied magnetic field.

Key words: YBa2Cu3O7-x (YBCO) film, flux pinning, BaTiO3 (BTO) and Y2O3 nanostructures, metal organic deposition using trifluoroacetates (TFA-MOD)

中图分类号:  (Superconducting films and low-dimensional structures)

  • 74.78.-w
81.16.Dn (Self-assembly)